Constructional material



Patented July 8, 1930 UNITED STATES PATENT OFFICE ALBERT C. FISCHER, OF CHICAGO, ILLINOIS, .ASSIGNOR TO THE PHILIP CAREY MANU- FACTURING COMPANY, A CORPORATION'OFOHIO I qoNs'rRUcTIoNAL M TERIAL No Drawing.

The improved construction material is prepared in sheet form and may be utilized for expansion joint purposes, roofing, siding, floor covering. deck covering. individual and strip shingles, and the like. I

I have found when a binding material has finely divided fibre added to it, and strips of strengthening material are added there-to in certain proportions. that a very strong sheet can be developed. said binding. material is preferably a waterproof material'o'r a. waterproof binder. and it may be understood that the binding material may in itself develop great tensile strength, depending largely 5 upon how it is fabricated.

A resin rubber compound filled with fibrous .matter will .be a much stronger binder than bituminous matter having a paratfine base. Likewise bituminous material having an asphalt base.

bituminous material having a paraifine base. Likewisean asphaltic binder produced from Mid Continent residues or Mexican residues.

which are more tenacious. v

Considerable variations may be experieneedin the waterproof binder, and for the purpose of this invention I will give the preferred formula of asphaltic material having a penetration on a Howard V. Morse. Y.

30 Testing Laboratories. pentrometer of from 21 to 25degreesat 32. F., 25 to degrees at v 77 vF. and to degrees at 115 F.. the melting point ranging from 220 to 260. This-particular binding material is soluble in carbondisulphide to the extent of 99.6 percent.

By adding to this binding material uncoagulated latex orbyadding tothis binding material dissolved rubber it can be greatly strengthened. but likewise the expense will greatly increase. Therefore, I preferthe formula outlinedas the binder.

I find that finely divided fibrous"material distributed thru said binder also aids in strengthening it, and adds toughness thereto,

said finely divided material may be such materials as cotton, jute fibre, wood pulp, linters, roofing scrap, which also has some asphaltic matter distributed therethru, or in fact any will be much stronger than the I} I fifty-one (51) per cent asphalt,-of the type described, and forty (40) per cent roofing scrap.

Application filed December 7. 1925. Serial No. 73,928.

finely divided fibrous material which will add from forty-five to sixty-three (63) per cent, this range producing the best-result. and as stated, other binders toughened at greater expense may be more effective, but for the purose of this invention the preferred form of of the type described. will answer the purpose. I

As a strengthening material I employ corn husks, tough grasses. or in fact any vegetation or Web which is fiat, as distinguished .from

round, andhas considerable strong fibre in the web state.

My preferred formula is to utilize corn husks dry, of which materials I use nine; (9) per cent. The percentage'sof'husk materials range from five (5) per cent to seventeen 1T v per cent, but I find that nine (9) per cent.-

of this particular strengthening Web together with forty (40) per cent of the roofing scrap and fifty'one (51) per cent of the asphalt described give the best results.- Alternating proportions. of these same materials, where a lesser percentage of husks and a greater percentage of roofing chips is shown show a weaker structure. Likewise, where a higher percentage of strengthening web and a lower percentage of roofing chips are employed together with a higherpercentage of asphalt,

I find that the tensile strength decreases. A paraifinous base, blown asphalt, will show a tensile strength of approximately forty (40) pounds to the squareinch. An asphalt containing a Mexican asphalt can be preimproved construction material I disclose a tabulation of the approximate tensile strengths in pounds per square inch, obtained by varying the amounts of the materials entering into the formation of the construction material.

Bitumi- Tensile gboeurss Asphalt Hunks strength Per cent Per cent Per cent 5 301 48 45 7 am 51 40 9 313 64 36 v 11 296 57 30 13 291 25. 15 m0 63 20 17 254 From this table it will be noted that the maximum strength disclosed is obtained when the mixture comprises fifty-one (51) per cent fibrous material mixed with bitumen, forty (40) per cent as belt and nine (9) per cent husk material. decreasing or increasing thedhusk content the tensile strength is lowere The materials are suitably mixed in a power mixer, placed between pressing rolls rolled into sheets and cut into strips. I that it is not advantageous to mix too long, as it is detrimental to break the fibre in ex ceedingly small pieces. The stren h of the material will be in proportion to t e size at which the stren thening web material can be incor oratcdibut the strength herein lies in the bu rather than in a mass covered with an outer web of reinforcing means.

It is preferred that flat, strengthening webs be employed rather than rounded fibres, such as, broom corn, straw, and the like, as the flat particles spread themselves over the mastic area and thus add ri 'dity to the mass. After being pressed into s ape these strengthening webs form themselves into interlaced or stagsheet, and flattenin themselves gered relation, running lengthwise of the pretty much over given areas. 'fhe sheet so prepared may then be employed for structural materials of various kinds, as cited, and this material is particularly adapted for expansion joint purposes because of the tensile strength at elevated temperatures. I claim: j

1. Preformed constructional material com d of a plastic mass containing a ductile waterproofing binder, finely divided of Dec., 1925.

roofing scrap, and reenforcing elements of relatively large surface areas.

2. Preformed constructional material composed of a plastic mass containing a ductile waterproofing binder, finely divided roofing scrap and corn husks.

3. Preformed constructional material composed of a plastic mass containing a ductile waterproofing binder, finely divided roofing scrap, rubber, and reenforcing elements of relatively large surface areas.

4. Preformed constructional composed of a plastic mass containing a predominating proportion of ductile waterproofing'blnder and a subordinate proportion of finely divided roofing scrap and reenforcing elements of relatively large surface areas.

5. Preformed expansion joint strips composed of a plastic mass containing a ductile waterproofing binder, finely divided roofing scrap, and reenforcing elements of relative- 1y large surface areas.

6. Preformed expansion joint strips composed of a plastic mass containing a ductile waterproofingbinder, finely divided roofing scrap and corn husks.

7 Preformed expansion joint strips composed of a plastic mass containing a ductile waterproofing binder, finely divided roofing scrap, rubber, and reenforcing elements of relatively large surface areas.

8. Preformed expansion joint strips composed of a plastic mass containing a predominating proportion of ductile waterproofing binder and a subordinate proportion of finely divided roofing scrap and reenforcing elements of relatively large surface areas.

9. A composition of matter composed of a plastic mass containing a ductile waterproofing binder, finely divided roofing scrap, and reenforcing elements of relatively large surface areas.

10. A composition of matter composed of a plastic mass containing aductile waterproofing binder, and corn husks.

11. A composition of matter composed of a plastic mass containing a ductile waterproofing binder, finely divided roofing scrap, rubber, and reenforcing elements of relatively large surface areas.

12. A composition of matter composed of a plastic mass containing a predominating proportion of ductile'waterproofin binder and a subordinate proportion of nely divided roofing scrap and reenforcing elements of relatively large surface areas.

Signed at Chicago, Illinois this 4th day ALBERT C. FISCHER.

finely divided roofing scrap 

